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Page 28 of 36 <br /> alscience %N ACCp,� <br /> Emronmental Quality Control - LCS/LCS Duplicate <br /> aboratories, Inc. "r s <br /> Cardno ERI Date Received: N/A <br /> 601 North McDowell Blvd. Work Order No: 12-03-1242 <br /> Petaluma, CA 94954-2312 Preparation: EPA 5030C <br /> Method: EPA 82608 <br /> Project: ExxonMobil99CAS/022789C <br /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 099.12-884-822 Aqueous GC/MS L 03/24/12 03/24/12 1203241-02 <br /> Parameter SPIKE ADDED LCS%REQ LCSD%REQ %REC CL ME CL RPD RPD CL Qualifiers <br /> Benzene 10.00 103 97 80-120 73-127 6 0-20 <br /> Toluene 10.00 104 100 80-120 73-127 5 0-20 <br /> Ethylbenzene 10.00 106 103 80-120 73-127 3 0-20 <br /> Methyl-t-Butyl Ether(MTBE) 10.00 109 106 69-123 60-132 2 0-20 <br /> Tert-Butyl Alcohol(TBA) 50.00 97 98 63-123 53-133 0 0-20 <br /> Diisopropyl Ether(DIPE) 10.00 104 100 59-137 46-150 4 0-37 <br /> Ethyl-t-Butyl Ether(ETBE) 10.00 108 102 69-123 60-132 6 0-20 <br /> Tert-Amyl-Methyl Ether(TAME) 10.00 102 100 70-120 62-128 2 0-20 <br /> Ethanol 100.0 90 93 28-160 6-182 4 0-57 <br /> 1,2-Dibromoethane 10.00 103 100 79-121 72-128 3 0-20 <br /> 1,2-Dichloroethane 10.00 101 97 80-120 73-127 4 0-20 <br /> Total number of LCS compounds: 11 <br /> Total number of ME compounds: 0 <br /> Total number of ME compounds allowed: 1 <br /> LCS ME CL validation result: Pass <br /> RPD-Rel®tive Percent Difference, CL-Control Limit <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714)894-7501 <br />